Du – WiFi
Du offers a network of WiFi hotspots around Dubai. They can be found in shopping, malls, cafes, and restaurants throughout the city. Locations include Starbucks coffee shops (at most shopping malls).
Du wireless broadband connections are also available on the Dubai Metro, at both stations and on trains.
Users need a WiFi enabled device (mobile telephone, laptop etc.) to access the service. Customers can pay for the service using with a credit card or Du WoW recharge card.
Etisalat
Etisalat also offers wireless internet access at various places around the city.
Free WiFi
Caffe Nero offers free wireless internet access at its coffee houses in Dubai. Locations include The Dubai Mall, Dubai Festival City, and the Dubai Marina Mall.
Free wireless internet access is also available throughout Dubai International Airport and at many hotels.

My girlfriend is in Dubai and she keeps telling me that there is lousy internet service for her laptop and lousy satellite service for her cell phone…….she has been saying this for months…..is she correct???
The RTA has announced that Du will provide WiFi on the new Dubai Tram network. To celebrate the launch, Du will offer a free service on November 12 and 13.
MAF malls (Mall of Emirates, Mirdif and Deira City Centre) all offer free wifi – you submit your phone number and they text you a code.
Thanks. I was aware of that but had forgotten to mention it here. Good tip.
Do you need a UAE number or can visitors also use it?
Du is to offer free wireless internet several public areas such as parks. A memorandum of understanding was signed at GITEX 2014 between the company and Dubai Municipality.
Parks benefiting from the free WiFi service will include Al Mamzar Park, Mushrif Park, and Zabeel Park. The service will begin to roll out within the next 6 months.
Jumeirah Beach Park and Safa Park will not receive the service until 2016 at the earliest due to Dubai Canal construction work.